I've already tryed that, but mobi format on kindle doesn't show some specific fonts (romanian - latin 10). So, I need to save rtf, doc, etc as html, send it to amazon and let their system to convert the file from html to azw which looks right in my language. I just wanted to manage things on my own, and let amazon out of the loop... Thanks for your post!

Grapho - as far as I know, azw is simply mobi format encrypted with Amazon's Digital Rights Management coding. The problem you're having is most likely to do with the character encoding specified when you convert a file. Have you tried using Kindlegen to convert the HTML to MOBI?